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Dairy Cattle And Reproduction

Subjects : industries, dairy
Instructions:
  • Answer 50 questions in 15 minutes.
  • If you are not ready to take this test, you can study here.
  • Match each statement with the correct term.
  • Don't refresh. All questions and answers are randomly picked and ordered every time you load a test.

This is a study tool. The 3 wrong answers for each question are randomly chosen from answers to other questions. So, you might find at times the answers obvious, but you will see it re-enforces your understanding as you take the test each time.
1. Days which have increasing daylight hours

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2. Not under a timeline - cow can not be sold as steak






3. (FSH) causes egg to mature in females






4. Depository for semen during insemination. where urine leaves the body






5. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






6. Allows extension of penis without fibro-elastic penis






7. Gonadotropic (GnRH) is (FSH and LH). Follical Stimulating (FSH) and Lutinizing Hormone (LH).






8. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






9. Look for infection - split - and rupture of the penis






10. Cycle that lasts weeks (ovulation->hormone cycles->ovulation)






11. 14-19 (17) days






12. 336 days






13. Produce testosterone. located between the seminiferous tubules






14. Not being bred back into herd. horses are seasonal breeders vs. cows as anytime breeders






15. Scar tissue plugs up chambers of udder






16. Way to know everything is alright with the breeding male






17. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






18. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






19. 1-2 days






20. Larger the cow - more milk is produced; smaller the cow - less milk is produced






21. Completes uterine growth initiated by estrogen and prepares the uterus for nourishment of developing embryo if pregnancy occurs - supports pregnancy by maintaining quiescent state of reproductive tract and suppresses mating behavior - prevents ovulat






22. When she is pregnant in her last trimester because she needs the energy to carry around and deliver the calf. and when the calf is born because the cow needs the fat to be deposit it into her milk for the calf's energy stores.






23. Duct which connects epididymis to urethra of the penis. transports sperm at ejaculation. cut to sterilize male.






24. Days which have decreasing daylight hours

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25. The more stressed out the male is - the less sperm he is going to produce






26. 1. seminiferous tubules - 2. sertoli cells - 3. leydid or interstitial cells






27. Small tubes located at the upper ends of the uterine horns. connects uterine horn to infundibulum. passageway of the egg.






28. 1. reproduction - 2. mastitis/udder problems - 3. low milk production - 4. soundness/poor feet and legs (living on concrete)






29. 283 days






30. Start of the reproductive tract for the female. located outside of the body






31. 14-19 (17) days






32. BST given to dairy cattle makes the mammary gland more persistent - helps produce more milk. good as Long-term because it does not cause cow to bulk up - provides more milk/cow Which means less cows needed - less cows need to be given feed - lower co






33. So when offspring are born - there is more food to be found for energy stores and fat deposits IN THE SPRING






34. What about the sperm for a bull which has been castrated but still has testicles?






35. Birthing process (termination of gestation)






36. (male) pushes the testes outward toward the legs for a cool-down off of the body






37. (male) pushes the testes upward toward the body for warmth or protection






38. Actual heat cycle (period)






39. 1. bring in new genes - 2. replace males with leg problems (difficulty breeding) Note: culling has a much greater emphasis in the dairy industry vs the beef industry.






40. 1. sperm is not implanted in egg until hours after breeding. 2. fetal growth has not yet finished.






41. 10-37 (21) days






42. (male) Primary sex organ - produces sperm (male gamete) and male sex hormones - 2 total






43. Can produce 200 calves naturally (~100 bulls) - top 1-2% will grade like him. everything left to chance if no AI performed






44. S-shaped inside body - relaxes to be exposed for breeding. Disadvantges: muscles weaken with age - cannot always hold it in - exposed to harsh outside conditions or stepped on.

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45. Supply nutrients for the sperm following ejaculation and deposition into the female reproductive tract






46. 30-38 hours after estrus cycle begins






47. Knife-loose ~1wk of growth. band-loose ~2wks of growth.






48. Constitute 50-90% of the volume of the ejaculate. (3 glands total: seminal vesicles - prostate gland - cowper's gland)






49. Indicator of sperm production. the bigger the scrotal circumference the bigger volume of sperm because more seminal vesicles available to produce the sperm






50. Parturition is controlled by...